Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e04f072da1a1fb…

MALICIOUS

PDF

156.7 KB Created: 2021-08-25 03:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c40a969384a73d88033bb70a649e0f09 SHA-1: 82b4d6dff875821abcabf0a0a643369f4485c716 SHA-256: d6e04f072da1a1fb2ee115a4ad3038076c40674b1a02ab893d86fb8badda8f93
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress installations and disposable hosting. Heuristics indicate this is a link farm designed to direct users to external sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9873

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f2b00751c---felulat.pdf In PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffa2aa2175---10612972317.pdfPDF link annotation
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/4df68lcf2ambhuhhp7qpa1eecv/xomilinotopafif.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/6372390509.pdfIn PDF document text
    • https://netcsemege.hu/ckfinder/userfiles/files/rejawonolavotadiv.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/71640916203.pdfIn PDF document text
    • http://vimar.ua/userfiles/files/96087145631.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160763836ef721---vagimidu.pdfIn PDF document text
    • https://cristalensi.com/public/File/fenevezas.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/35114298306.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/96162633701.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=invented+the+first+airplanePDF link annotation

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